Hey Pablo,
Welcome to the site, Quite a few of "The Regulars" are of on some doggone adventure and won't be back
for a few days.
I am no expert, but firing up the old girl after being in long storage doesn't seem too far removed from
a current re-build. (I would Think)
Getting the pre-mix moving down in the mains and cyl wall would be my concern.
The easiest way I can think of doing that is to pull the plug and run the kicker through until you have some mix showing up.
I Lay a paper towel over the plug hole watch for the fuel.
CAUTION: I have seen the results of not holding in the kill button and the bike catching fire.
A friend of mine dropped off his kids pw80 and it looked really bad...He said he was checking for spark on the cyl head while his kid kicked over the bike...Whoof! Almost as bad as the desert scene in On Any Sunday, but I Digress!
The ignition system is absolutely able to light off the fuel as it spits out the plug hole if left uncovered and not shunted or grounded out (Kill Switch/Button)...
After you see the fuel showing up on the paper towel, wait a few moments for the excess fuel to evaporate, reinstall your plug and get ready for your break-in.
That's how I would get things lubed up and ready for start.
You might also post the question on how to proceed in another thread, I'm thinking you'll get some better help and some more attention!!
Tuck\o/